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going thru too many fuel pump relay switches

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    #1

    going thru too many fuel pump relay switches

    Hello Again,

    It seems like I am replacing the fuel pump relay switch every 3 weeks to 2 months. Since November, 4 months ago I have replaced the fuel pump relay switch 5-6 times. The car starts to run rough while driving or sometimes when starting. It acts like the fuel filter is dirty and clogged. I replace the fuel pump relay switch and it clears right up and drives fine until it happens at some random time a few weeks to a couple of months later.
    Any ideas?

    Thank you again,
    Mike
    90 Colony Park LS with GT 40 heads and intake. HO cam, 65 MM TB, 67 MM EGR spacer. Has a 75 MM Pro Flow mass air sensor. Borla XS mufflers. 3L55. Shift kit, 2000 stall Tq convertor...Bilstein shocks, front and rear sway bars.
    90 Colony Park LS 64,000 miles all original. 3L55 tow package....front and rear sway bars.
    91 Grand Marquis GS....HO motor..Bilstein shocks poly bushings and police swaybars. This one handles the best.
    70 Torino Squire with M code 351 Cleveland 3.00 has Magnaflow mufflers. Hidden headlights and power windows. All original
    Tags: None
    #2
    I wonder if the pump amp draw is taking out the relay contacts. Next time it happens break it open and see. If you have an ohm meter also check the relay coil before and after. You can ohm the contacts too.

    Sent from my VS980 4G using Tapatalk
    Using Tapatalk

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      #3
      gotta be high current draw, either from a failing pump or one thats working much too hard.
      86 Lincoln Town Car (Galactica).
      5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

      91 Lincoln Mark VII LSC grandpa spec white and cranberry

      1984 Lincoln Continental TurboDiesel - rolls coal

      Originally posted by phayzer5
      I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

      Comment

        #4
        Thank you guys.
        I did notice that the one I replaced most recently seemed to warm to the touch as I replaced it. I figured it was because it was in the engine compartment. Any thoughts or ideas as to when it is time to replace the ECM relay switch?

        Thank you,
        Mike
        90 Colony Park LS with GT 40 heads and intake. HO cam, 65 MM TB, 67 MM EGR spacer. Has a 75 MM Pro Flow mass air sensor. Borla XS mufflers. 3L55. Shift kit, 2000 stall Tq convertor...Bilstein shocks, front and rear sway bars.
        90 Colony Park LS 64,000 miles all original. 3L55 tow package....front and rear sway bars.
        91 Grand Marquis GS....HO motor..Bilstein shocks poly bushings and police swaybars. This one handles the best.
        70 Torino Squire with M code 351 Cleveland 3.00 has Magnaflow mufflers. Hidden headlights and power windows. All original

        Comment

          #5
          Check connections between the rear axle and the tank. One set can sometimes rubb against on the the braces in the frame.
          Check for any grounds in the harness going from the harness going from the relay to the pump.
          Scars are tatoos of the fearless

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